51單片機(jī)+ADC0808電壓采集proteus仿真及源程序

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發(fā)布時(shí)間: 2016-9-12 00:32

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ID:736542 發(fā)表于 2020-4-23 22:57

#include "at89x51.h"
#define uchar unsigned char
#define uint unsigned int
uint a_100;
uchar bai,shi,ge;
sbit RS=P3^0;
sbit RW=P3^1;
sbit E=P3^5;
sbit P17=P1^7;
sbit P27=P2^7;
sbit start=P3^6;
sbit OE=P3^7;
sbit EOC=P3^2;
sbit P20=P2^0;
uchar code disp[]={"welcome to use"};
delay ()
{
uchar i,j;
for (i=0;i<5;i++)
for (j=0;j<50;j++);
}
wr_order (uchar h)
{
E=0;
RS=0;
RW=0;
P1=h;
E=1;
E=0;
}
wr_data (uchar h)
{
E=0;
RS=1;
RW=0;
P1=h;
E=1;
E=0;
}
busy ()
{
flag:
E=0;
RS=0;
RW=1;
P1=0xff;
E=1;
if (P17==0)
  return;
else goto flag;
}
LCD_start()
{
busy ();
wr_order (0x01);
busy ();
wr_order (0x0c);
busy ();
wr_order (0x38);
}
wlcome ()
{
uchar i;
busy ();
wr_order (0x00+0x80);
for (i=0;i<50;i++)
  {
busy ();
wr_data (disp[i]);
if (disp[i]=='\0')
break;
  }

}
BCD_data()
{
uchar j;
a_100=a_100*100;
a_100=a_100/51;
j=a_100/100;
bai=j+48;
j=a_100%100/10;
shi=j+48;
j=a_100%10;
ge= j+48;
}
uchar BCD ()
{
uchar ad;

OE=1;
start=1;
start=0;
start=1;
while(EOC);
OE=0;
ad=P0;
OE=1;
delay ();
return ad;
}
xianshi ()
{
busy ();
wr_order (0x40+0x80);
busy ();
wr_data (bai);
busy ();
wr_data ('.');
busy ();
wr_data (shi);
busy ();
wr_data (ge);
busy ();
wr_data ('v');
}
main ()
{

LCD_start ();
wlcome ();
while(1)
  {
a_100=BCD ();
BCD_data ();
xianshi ();

  }
}

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ID:619680 發(fā)表于 2019-10-6 10:15